This is Willem Caland's English translation of the Shankhayana Shrauta Sutras. The core scriptures of Hinduism are the four Vedas: Rig, Yajur, Sama, and Atharvana. Each Veda comes in a bunch of different Shakhas or recensions. Associated with each Shakha are Kalpa Sutras, texts which elucidate the Yagnas or fire-rituals described in the Vedas. Kalpa Sutras come in three forms: Grihya Sutras, which describe household Yagnas; Shrauta Sutras, which describe large public Yagnas; and Shulba Sutras, which describe the geometry of Yagna altars.
Now one of the Shakhas of the Rig Veda is known as Bashkala Shakha. Its Kalpa Sutras were authored by the sage Shankhayana. It is the Shrauta Sutra text of this Shakhas, known as as Shankhayana Shrauta Sutras, that is translated here. This is one of the only English translations of a Shrauta Sutra text ever written.